Edge-trimmer for boots or shoes



(No Model.)

r S. K. KNOX.

, EDGE TRIMMER FOR BOOTS 0R SHOES.

Patented Feb. 17, 18-85.

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SANFORD K. KNOX, OF NORTH ABINGTON, MASSACHUSETTS.

EDGE-TRIMMER FOR BOOTS OR SHOES.

SPECIFICATION forming part of Letters Patent No. 312,360, dated February 17, 1885.

Application filed April 17, 1884. (No model.)

To all whom, it may concern.-

Be it known that I, SANFORD K. KNOX, of North Abington, county of Plymouth, State of Massachusetts, have invented an Improvement in Edge-Trimmers for Boots or Shoes, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention is an improvement on that class of edge-trimming machines having a circular cutter attached to a rotating shaft.

My invention consists in combining with a rotating shaft and cutter a guard provided with clearance-holes and made independently adjustable both vertically and laterally, as will be described, to present more or less of the ends of the blades of the cutter below and in front of the circumferential edge of the guard, according to the work to be done, also, in the combination, with the rotating cutter, of a spring-pressed rest or gage to operate as will be described.

Figure l represents-in front elevation a sufficient portion of an edge-trimming machine to illustrate my invention. the guard being partially broken out; and Fig. 2, a side elevation thereof, partially broken out, to illustrate the'construction of the parts.

The head A, having bearings A A, and the rotating shaft B, provided with pulley B, are all as usual. The driving-shaft has the cutter 0 attached to it by screw 2, the face of the cutter being recessed for the reception of the head of the said screw, as shown in Fig. 2.

The cutter is composed of adisk notched at its edge, as shown, to form a series of teeth 3, which, by adjustment of the guard D into a more or less eccentric position with relation to the center of thecutter, throws the projecting blades or teeth of the cutter more or less beyond the circumferential edge of the guard, as shown in Fig. 1. This guard has a clearance hole, (1, for each tooth, and the shavings or chips taken off by the teeth pass out through the said holes, thus enabling the cutter to clear itself very rapidly and freely,

- which would not be the case if the guard had but two holes, one near its upper and the other near its lower edge. The guard D is connected by screw -bolt d with the guardholding plate E, attached to the bracket F by the set-screw G and the adjusting screw or bolt H, the former being extended loosely through a broad slot, 9, and screwed into the 5 5 plate, while the latter, grooved annularly, as at 7r, for the reception of a pin, h, is screwed into an ear, c of the said plate. The screw H enables the plate to be adjusted vertically, and the screw G and slot 9 enable it to be held in adjusted position against lateral strain. The fit between the screw H and bracket is a loose one. The rounded shank f ofthe bracket is clamped between the ears f" f of the bearing A, which is split at its side by the screw f, operated by the handlef, so that both the bracket and plate E may be oscillated about f as a center, to place the center of bolt d (more or less) out of the line of the center of the shaft B and cutter. The outer face of the sole being trimmed will be pressed against the loosely-held disk or roller in, mounted upon the end of the rod in, placed in a socket in the hearing A, the inner end of the said rod being acted upon by a spring, m

If it is desired to prevent longitudinal movement of the rod m, the set-screw in maybe turned in against it, holding the wheel in at the desired distance from the guide, according to the thickness of the sole being trimmed. The edge of the guide D runs in the crease between the sole and the upper.

I claim- 1. The rotating shaft, its attached disk-cutter provided with a series of blades, the bracket F, having a round shank and capable of being adjusted about its own axis, and its attached adjustable plate E, and guide connected with the said plate, combined with the screws G and H, whereby the guide may be adjusted with relation to the cutter, substantially as described.

2. The rotating shaft and its attached cutter provided with blades, and the guide D, combined with the wheel at, against which the sole ofthe shoe may be pressed, and the horizontally-sliding rod m, to carry the said wheel, all substantially as described.

In testimony whcreofl have signed my name to this specification in the presence of two sub-' 10o scribing witnesses.

SANFORD K. KNOX.

Witnesses:

W. T. FORD, E. P. BOYNTON. 

